Re: 41c battery types Message #2 Posted by Vassilis Prevelakis on 13 Oct 2005, 4:46 a.m., in response to message #1 by Hal
Hal wrote:
> I just acquired a 41c, and it's battery pack has the short
> cells (1/2 N's??) with the rectifier built into the end of the
> pack.
This sounds like the optional HP-82120A multipurpose rechargeable battery pack. You need a HP-82059B (110 Vac) or HP-82066B (220 Vac)
charger for this pack.
> I've seen photo's of 41c battery packs that use cells that run
> the full length of the pack, with no rectifier.
This is the standard battery pack that was supplied with every HP-41. It is designed to take non-rechargeable cells, so there is no need for a rectifier.
Some people put NiCd or NiMH cells in the standard pack and recharge them on an external (commercially available) charger.
However, there was a discussion on this very point just a few days ago and the consensus was that its not worth the bother. Just put alkaline N-size cells and change them once every 12 to 18 months.
**vp
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